My phone constantly displays 'no service' even when it has got full signal. I can't access voicemail because when I press and hold number 1 it comes up saying 'voicemail number missing' but it won't let me manually add the number because it's all greyed out. I can no longer move things to my memory card because every time I try it comes up 'failed'. I've tried factory resets and all the other pointless stuff the mobile network advises you to do such as selecting networks automatically etc. All to no avail. Everything worked perfect before the update and I'd even go as far as saying that I no longer like the phone as ac result of it and I'm really wishing I'd have stayed with HTC. If anyone out there has had these issues could you please advise me on what you did to sort it? My phone is not rooted nor is it network locked. It's the European version GT-I9505. The update was the official Samsung update that was pushed to my phone in March. Thank you.